Amal K. Maji, Niladri Maity, Pratim Banerji, and Debdulal Banerjee. 2013. “Validated RP-HPLC-UV Method for the Determination of Betulin in Asteracantha Longifolia (L.) Nees. Extract”. International Journal of Phytomedicine 5 (2):131-35. https://ijp.arjournals.org/index.php/ijp/article/view/241.